﻿//Ajax图片上传
//lblImgSizeId 图片建议尺寸Label控件Id
//fileId 文件上传控件Id
//hdnImgPathId 隐藏的图片路径控件Id
//imgId 图片控件Id
function ajaxImageUpload(lblImgSizeId, fileId, hdnImgPathId, imgId, callback) {
    var $lblImgSize = $("#" + lblImgSizeId);
    if ($lblImgSize.length == 0) {
        msgBox.showMsgErr(txt_RecommendedSize);
        return;
    }

    var strImgSize = $lblImgSize.text();
    if (strImgSize.indexOf("*") == -1) {
        msgBox.showMsgErr(txt_ProposedSizeError);
        return;
    }

    var imgSizeArray = strImgSize.split("*");
    if (imgSizeArray.length != 2) {
        msgBox.showMsgErr(txt_ProposedSizeError);
        return;
    }

    if (isNaN(imgSizeArray[0]) || isNaN(imgSizeArray[1])) {
        msgBox.showMsgErr(txt_ProposedSizeError);
        return;
    }

    var width = parseInt(imgSizeArray[0]);
    var height = parseInt(imgSizeArray[1]);

    msgBox.showMsgWait(txt_TryingToUploading);

    var tempUrl = "";
    if (typeof(isCheckSite) != "undefined") {//存在isCheckSite定义
        tempUrl = installPath + 'UploadFile.ashx?Operate=upload&SiteId=' + siteId + '&isCheckSite=' + isCheckSite; //用于文件上传的服务器端请求地址
    }
    else {
        tempUrl = installPath + 'UploadFile.ashx?Operate=upload&SiteId=' + siteId; //用于文件上传的服务器端请求地址
    }

    $.ajaxFileUpload({
        url: tempUrl, //用于文件上传的服务器端请求地址
        secureuri: false, //一般设置为false  安全性
        fileElementId: fileId, //文件上传空间的id属性
        dataType: 'json', //返回值类型 一般设置为json
        success: function (data, status) //服务器成功响应处理函数
        {
            if (data.error == 0) {
                var scale = 0.5;
                if (width > 1000) {
                    scale = 0.3;
                }
                else if (width >= 1500) {
                    scale = 0.2;
                }

                width = parseInt(width * scale);
                height = parseInt(height * scale);

                var url = data.url + "_" + width + "x" + height + ".ashx";
                $("#" + hdnImgPathId).val(data.url);
                $("#" + imgId).attr("src", url);
                msgBox.hidBox();
                if (callback != undefined && typeof (callback) == "function") {
                    callback();
                }
            }
            else {
                msgBox.showMsgErr(data.message);
            }
        },
        error: function (data, status, e) {
            console.log(JSON.stringify(data));
            msgBox.showMsgErr(txt_Error);
        }
    })
    return false;
}

jQuery.extend({
    handleError: function (s, xhr, status, e) {
        // If a local callback was specified, fire it
        if (s.error)
            s.error(xhr, status, e);
            // If we have some XML response text (e.g. from an AJAX call) then log it in the console
        else if (xhr.responseText)
            console.log(xhr.responseText);
    }
});

jQuery.extend({
    createUploadIframe: function (id, uri) {
        //create frame
        var frameId = 'jUploadFrame' + id;
        var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
        if (window.ActiveXObject) {
            if (typeof uri == 'boolean') {
                iframeHtml += ' src="' + 'javascript:false' + '"';
            } else if (typeof uri == 'string') {
                iframeHtml += ' src="' + uri + '"';
            }
        }
        iframeHtml += ' />';
        jQuery(iframeHtml).appendTo(document.body);

        return jQuery('#' + frameId).get(0);
    },
    createUploadForm: function (id, fileElementId) {
        //create form	
        var formId = 'jUploadForm' + id;
        var fileId = 'jUploadFile' + id;
        var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
        var oldElement = jQuery('#' + fileElementId);
        var newElement = jQuery(oldElement).clone();
        jQuery(oldElement).attr('id', fileId);
        jQuery(oldElement).before(newElement);
        jQuery(oldElement).appendTo(form);
        //set attributes
        jQuery(form).css('position', 'absolute');
        jQuery(form).css('top', '-1200px');
        jQuery(form).css('left', '-1200px');
        jQuery(form).appendTo('body');
        return form;
    },

    ajaxFileUpload: function (s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout		
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()
        var form = jQuery.createUploadForm(id, s.fileElementId);
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = 'jUploadFrame' + id;
        var formId = 'jUploadForm' + id;
        // Watch for a new set of requests
        if (s.global && !jQuery.active++) {
            jQuery.event.trigger("ajaxStart");
        }

        var requestDone = false;
        // Create the request object
        var xml = {}
        if (s.global)
            jQuery.event.trigger("ajaxSend", [xml, s]);

        // Wait for a response to come back
        var uploadCallback = function (isTimeout) {
            var io = document.getElementById(frameId);
            try {
                if (io.contentWindow) {
                    xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
                    xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
                } else if (io.contentDocument) {
                    xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
                    xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
                }
            } catch (e) {
                jQuery.handleError(s, xml, null, e);
            }

            if (xml || isTimeout == "timeout") {
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if (status != "error") {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData(xml, s.dataType);
                        // If a local callback was specified, fire it and pass it the data
                        if (s.success)
                            s.success(data, status);

                        // Fire the global callback
                        if (s.global)
                            jQuery.event.trigger("ajaxSuccess", [xml, s]);
                    } else
                        jQuery.handleError(s, xml, status);
                } catch (e) {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }

                // The request was completed
                if (s.global)
                    jQuery.event.trigger("ajaxComplete", [xml, s]);

                // Handle the global AJAX counter
                if (s.global && ! --jQuery.active)
                    jQuery.event.trigger("ajaxStop");

                // Process result
                if (s.complete)
                    s.complete(xml, status);

                jQuery(io).unbind()

                setTimeout(function () {
                    try {
                        jQuery(io).remove();
                        jQuery(form).remove();

                    } catch (e) {
                        jQuery.handleError(s, xml, null, e);
                    }

                }, 100)

                xml = null
            }
        }

        // Timeout checker
        if (s.timeout > 0) {
            setTimeout(function () {
                // Check to see if the request is still happening
                if (!requestDone) uploadCallback("timeout");
            }, s.timeout);
        }
        try {
            var form = jQuery('#' + formId);
            jQuery(form).attr('action', s.url);
            jQuery(form).attr('method', 'POST');
            jQuery(form).attr('target', frameId);
            if (form.encoding) {
                jQuery(form).attr('encoding', 'multipart/form-data');
            } else {
                jQuery(form).attr('enctype', 'multipart/form-data');
            }
            jQuery(form).submit();

        } catch (e) {
            jQuery.handleError(s, xml, null, e);
        }

        jQuery('#' + frameId).load(uploadCallback);
        return { abort: function () { } };
    },

    uploadHttpData: function (r, type) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;

        // If the type is "script", eval it in global context
        if (type == "script")
            jQuery.globalEval(data);

        // Get the JavaScript object, if JSON is used.
        if (type == "json") {
            ////////////以下为新增代码-dan 2015/11/3///////////////  
            data = r.responseText;
            var start = data.indexOf(">");
            if (start != -1) {
                var end = data.indexOf("<", start + 1);
                if (end != -1) {
                    data = data.substring(start + 1, end);
                }
            }
            ///////////以上为新增代码-dan 2015/11/3/////////////// 
            eval("data = " + data);
        }

        // evaluate scripts within html
        if (type == "html")
            jQuery("<div>").html(data).evalScripts();

        return data;
    }
});
